CURA-11795 Activate fans during switch

include/gcodeExport.h

@@ -8,6 +8,7 @@
 #ifdef BUILD_TESTS
 #include <gtest/gtest_prod.h> //To allow tests to use protected members.
 #endif
+#include <optional>
 #include <sstream> // for stream.str()
 #include <stdio.h>
 
@@ -89,7 +90,7 @@ class GCodeExport : public NoCopy
 
         double last_e_value_after_wipe_; //!< The current material amount extruded since last wipe
 
-        unsigned fan_number_; // nozzle print cooling fan number
+        size_t fan_number_; // nozzle print cooling fan number
         Point2LL nozzle_offset_; //!< Cache of setting machine_nozzle_offset_[xy]
         bool machine_firmware_retract_; //!< Cache of setting machine_firmware_retract
 
@@ -150,8 +151,8 @@ class GCodeExport : public NoCopy
                           //!< other layer parts)
 
     size_t current_extruder_;
-    double current_fan_speed_;
-    unsigned fan_number_; // current print cooling fan number
+    std::map<size_t, double> current_fans_speeds_; //!< Current fan speed, by fan index. No value means the speed has never been set yet.
+    size_t fans_count_{ 0 };
     EGCodeFlavor flavor_;
 
     std::vector<Duration> total_print_times_; //!< The total estimated print time in seconds for each feature
@@ -533,13 +534,28 @@ class GCodeExport : public NoCopy
     void writePrimeTrain(const Velocity& travel_speed);
 
     /*!
-     * Set the print cooling fan number (used as P parameter to M10[67]) for the specified extruder
-     *
-     * \param extruder The current extruder
+     * \brief Write a set fan speed command, if different from the actual speed
+     * \param speed The new fan speed, which should be [0.0, 100.0]
+     * \param extruder The extruder for which we want to set the cooling fan speed, or nullopt to use the current extruder
+     */
+    void writeFanCommand(double speed, std::optional<size_t> extruder = std::nullopt);
+
+    /*!
+     * \brief Write a set fan speed command for the given fan, if different from the actual speed
+     * \param speed The new fan speed, which should be [0.0, 100.0]
+     * \param fan_number The fan for which we want to set the speed
      */
-    void setExtruderFanNumber(int extruder);
+    void writeSpecificFanCommand(double speed, size_t fan_number);
 
-    void writeFanCommand(double speed);
+    /*! Write cooling fan speeds before proceeding an extruder switch */
+    void writePrepareFansForNozzleSwitch();
+
+    /*!
+     * \brief Write the cooling fan speeds before starting an actual extrusion
+     * \param current_extruder_new_speed The new speed for the currently active extruder
+     * \note All other cooling fans but the active one will be deactivaed
+     */
+    void writePrepareFansForExtrusion(double current_extruder_new_speed);
 
     /*!
      * \brief Write a GCode temperature command

include/settings/EnumSettings.h

@@ -272,6 +272,16 @@ enum class BrimLocation
     EVERYWHERE = 0x03, // Brim on both the outside and inside of the model
 };
 
+/*!
+ * How to enable/disable cooling fan(s) during extruder switch
+ */
+enum class CoolDuringExtruderSwitch
+{
+    UNCHANGED, // Let fans as they are during nozzle switch (historical behavior)
+    ONLY_LAST_EXTRUDER, // Turn on fan of the previously used extruder to cool it down, turn others off
+    ALL_FANS, // Turn on all fans
+};
+
 /*!
  * Convenience binary operator to allow testing brim location easily, like (actual_location & BrimLocation::OUTSIDE)
  */

src/LayerPlan.cpp

@@ -2079,6 +2079,8 @@ void LayerPlan::writeGCode(GCodeExport& gcode)
                 gcode.switchExtruder(extruder_nr, prev_retraction_config.extruder_switch_retraction_config);
             }
 
+            gcode.writePrepareFansForNozzleSwitch();
+
             { // require printing temperature to be met
                 constexpr bool wait = true;
                 gcode.writeTemperatureCommand(extruder_nr, extruder_plan.required_start_temperature_, wait);
@@ -2121,7 +2123,7 @@ void LayerPlan::writeGCode(GCodeExport& gcode)
                 }
             }
         }
-        gcode.writeFanCommand(extruder_plan.getFanSpeed());
+        gcode.writePrepareFansForExtrusion(extruder_plan.getFanSpeed());
         std::vector<GCodePath>& paths = extruder_plan.paths_;
 
         extruder_plan.inserts_.sort();

src/gcodeExport.cpp

@@ -47,7 +47,6 @@ GCodeExport::GCodeExport()
 
     current_e_value_ = 0;
     current_extruder_ = 0;
-    current_fan_speed_ = -1;
 
     total_print_times_ = std::vector<Duration>(static_cast<unsigned char>(PrintFeatureType::NumPrintFeatureTypes), 0.0);
 
@@ -64,7 +63,6 @@ GCodeExport::GCodeExport()
     machine_heated_build_volume_ = false;
     ppr_enable_ = false;
 
-    fan_number_ = 0;
     use_extruder_offset_to_offset_coords_ = false;
     machine_name_ = "";
     relative_extrusion_ = false;
@@ -96,6 +94,7 @@ void GCodeExport::preSetup(const size_t start_extruder)
         extruder_attr_[extruder_nr].last_retraction_prime_speed_
             = train.settings_.get<Velocity>("retraction_prime_speed"); // the alternative would be switch_extruder_prime_speed, but dual extrusion might not even be configured...
         extruder_attr_[extruder_nr].fan_number_ = train.settings_.get<size_t>("machine_extruder_cooling_fan_number");
+        fans_count_ = std::max(fans_count_, extruder_attr_[extruder_nr].fan_number_ + 1);
 
         // Cache some settings that we use frequently.
         const Settings& extruder_settings = Application::getInstance().current_slice_->scene.extruders[extruder_nr].settings_;
@@ -747,8 +746,6 @@ bool GCodeExport::initializeExtruderTrains(const SliceDataStorage& storage, cons
         }
     }
 
-    setExtruderFanNumber(start_extruder_nr);
-
     return should_prime_extruder;
 }
 
@@ -1313,8 +1310,6 @@ void GCodeExport::startExtruder(const size_t new_extruder)
 
     // Change the Z position so it gets re-written again. We do not know if the switch code modified the Z position.
     current_position_.z_ += 1;
-
-    setExtruderFanNumber(new_extruder);
 }
 
 void GCodeExport::switchExtruder(size_t new_extruder, const RetractionConfig& retraction_config_old_extruder, coord_t perform_z_hop /*= 0*/)
@@ -1429,21 +1424,23 @@ void GCodeExport::writePrimeTrain(const Velocity& travel_speed)
     extruder_attr_[current_extruder_].is_primed_ = true;
 }
 
-void GCodeExport::setExtruderFanNumber(int extruder)
+void GCodeExport::writeFanCommand(double speed, std::optional<size_t> extruder)
 {
-    if (extruder_attr_[extruder].fan_number_ != fan_number_)
-    {
-        fan_number_ = extruder_attr_[extruder].fan_number_;
-        current_fan_speed_ = -1; // ensure fan speed gcode gets output for this fan
-    }
+    const size_t extruder_set_fan = extruder.value_or(current_extruder_);
+    const size_t fan_number = extruder_attr_[extruder_set_fan].fan_number_;
+
+    writeSpecificFanCommand(speed, fan_number);
 }
 
-void GCodeExport::writeFanCommand(double speed)
+void GCodeExport::writeSpecificFanCommand(double speed, size_t fan_number)
 {
-    if (std::abs(current_fan_speed_ - speed) < 0.1)
+    auto iterator = current_fans_speeds_.find(fan_number);
+
+    if (iterator != current_fans_speeds_.end() && std::abs(iterator->second - speed) < 0.1)
     {
         return;
     }
+
     if (flavor_ == EGCodeFlavor::MAKERBOT)
     {
         if (speed >= 50)
@@ -1461,23 +1458,23 @@ void GCodeExport::writeFanCommand(double speed)
         *output_stream_ << "M106 S"
                         << PrecisionedDouble{ (should_scale_zero_to_one ? static_cast<uint8_t>(2) : static_cast<uint8_t>(1)),
                                               (should_scale_zero_to_one ? speed : speed * 255) / 100 };
-        if (fan_number_)
+        if (fan_number)
         {
-            *output_stream_ << " P" << fan_number_;
+            *output_stream_ << " P" << fan_number;
         }
         *output_stream_ << new_line_;
     }
     else
     {
         *output_stream_ << "M107";
-        if (fan_number_)
+        if (fan_number)
         {
-            *output_stream_ << " P" << fan_number_;
+            *output_stream_ << " P" << fan_number;
         }
         *output_stream_ << new_line_;
     }
 
-    current_fan_speed_ = speed;
+    current_fans_speeds_[fan_number] = speed;
 }
 
 void GCodeExport::writeTemperatureCommand(const size_t extruder, const Temperature& temperature, const bool wait, const bool force_write_on_equal)
@@ -1745,6 +1742,57 @@ void GCodeExport::insertWipeScript(const WipeScriptConfig& wipe_config)
     writeComment("WIPE_SCRIPT_END");
 }
 
+void GCodeExport::writePrepareFansForNozzleSwitch()
+{
+    const Settings& settings = Application::getInstance().current_slice_->scene.settings;
+    const auto cool_during_switch = settings.get<CoolDuringExtruderSwitch>("cool_during_extruder_switch");
+
+    if (cool_during_switch != CoolDuringExtruderSwitch::UNCHANGED)
+    {
+        const size_t current_extruder_fan_number = extruder_attr_[current_extruder_].fan_number_;
+
+        for (size_t fan_number = 0; fan_number < fans_count_; ++fan_number)
+        {
+            double fan_speed;
+            if (cool_during_switch == CoolDuringExtruderSwitch::ALL_FANS || fan_number == current_extruder_fan_number)
+            {
+                fan_speed = 100.0;
+            }
+            else
+            {
+                fan_speed = 0.0;
+            }
+
+            writeSpecificFanCommand(fan_speed, fan_number);
+        }
+    }
+}
+
+void GCodeExport::writePrepareFansForExtrusion(double current_extruder_new_speed)
+{
+    const Settings& settings = Application::getInstance().current_slice_->scene.settings;
+    const auto cool_during_switch = settings.get<CoolDuringExtruderSwitch>("cool_during_extruder_switch");
+    const size_t current_extruder_fan_number = extruder_attr_[current_extruder_].fan_number_;
+
+    for (size_t fan_number = 0; fan_number < fans_count_; ++fan_number)
+    {
+        double new_fan_speed;
+        if (fan_number == current_extruder_fan_number)
+        {
+            new_fan_speed = current_extruder_new_speed;
+        }
+        else if (cool_during_switch == CoolDuringExtruderSwitch::UNCHANGED)
+        {
+            continue;
+        }
+        else
+        {
+            new_fan_speed = 0.0;
+        }
+        writeSpecificFanCommand(new_fan_speed, fan_number);
+    }
+}
+
 void GCodeExport::setSliceUUID(const std::string& slice_uuid)
 {
     slice_uuid_ = slice_uuid;

src/settings/Settings.cpp

@@ -709,6 +709,24 @@ BrimLocation Settings::get<BrimLocation>(const std::string& key) const
     }
 }
 
+template<>
+CoolDuringExtruderSwitch Settings::get<CoolDuringExtruderSwitch>(const std::string& key) const
+{
+    const std::string& value = get<std::string>(key);
+    if (value == "all_fans")
+    {
+        return CoolDuringExtruderSwitch::ALL_FANS;
+    }
+    else if (value == "only_last_extruder")
+    {
+        return CoolDuringExtruderSwitch::ONLY_LAST_EXTRUDER;
+    }
+    else // Default.
+    {
+        return CoolDuringExtruderSwitch::UNCHANGED;
+    }
+}
+
 template<>
 std::vector<double> Settings::get<std::vector<double>>(const std::string& key) const
 {

tests/GCodeExportTest.cpp

@@ -51,7 +51,6 @@ class GCodeExportTest : public testing::Test
         gcode.current_e_value_ = 0;
         gcode.current_e_offset_ = 0;
         gcode.current_extruder_ = 0;
-        gcode.current_fan_speed_ = -1;
         gcode.total_print_times_ = std::vector<Duration>(static_cast<unsigned char>(PrintFeatureType::NumPrintFeatureTypes), 0.0);
         gcode.current_speed_ = 1.0;
         gcode.current_print_acceleration_ = -1.0;
@@ -61,7 +60,6 @@ class GCodeExportTest : public testing::Test
         gcode.setFlavor(EGCodeFlavor::MARLIN);
         gcode.bed_temperature_ = 0;
         gcode.initial_bed_temp_ = 0;
-        gcode.fan_number_ = 0;
         gcode.total_bounding_box_ = AABB3D();
         gcode.current_layer_z_ = 0;
         gcode.relative_extrusion_ = false;
@@ -211,7 +209,6 @@ class GriffinHeaderTest : public testing::TestWithParam<size_t>
         gcode.layer_nr_ = 0;
         gcode.current_e_value_ = 0;
         gcode.current_extruder_ = 0;
-        gcode.current_fan_speed_ = -1;
         gcode.total_print_times_ = std::vector<Duration>(static_cast<unsigned char>(PrintFeatureType::NumPrintFeatureTypes), 0.0);
         gcode.current_speed_ = 1.0;
         gcode.current_print_acceleration_ = -1.0;
@@ -221,7 +218,6 @@ class GriffinHeaderTest : public testing::TestWithParam<size_t>
         gcode.setFlavor(EGCodeFlavor::MARLIN);
         gcode.initial_bed_temp_ = 0;
         gcode.bed_temperature_ = 0;
-        gcode.fan_number_ = 0;
         gcode.total_bounding_box_ = AABB3D();
 
         gcode.new_line_ = "\n"; // Not BFB flavour by default.

tests/LayerPlanTest.cpp

@@ -133,16 +133,19 @@ class LayerPlanTest : public testing::Test
         settings->add("raft_surface_layers", "1");
         settings->add("raft_base_line_width", "0.401");
         settings->add("raft_base_acceleration", "5001");
+        settings->add("raft_base_flow", "100");
         settings->add("raft_base_jerk", "5.1");
         settings->add("raft_base_speed", "51");
         settings->add("raft_base_thickness", "0.101");
         settings->add("raft_interface_acceleration", "5002");
+        settings->add("raft_interface_flow", "100");
         settings->add("raft_interface_jerk", "5.2");
         settings->add("raft_interface_line_width", "0.402");
         settings->add("raft_interface_speed", "52");
         settings->add("raft_interface_thickness", "0.102");
         settings->add("raft_interface_layers", "3");
         settings->add("raft_surface_acceleration", "5003");
+        settings->add("raft_surface_flow", "100");
         settings->add("raft_surface_jerk", "5.3");
         settings->add("raft_surface_line_width", "0.403");
         settings->add("raft_surface_speed", "53");